Vacuum-insulated vessel.



F. E. CARLSON.

VACUUM INSULATED VESSEL. APPLICATION HLEVD MAY]. 1911.

1,243,919. Patented Oct 23,1917.

ranncx n. GARLSON, or new entrain, connncrrcur, nssrenoa r LANDERS, I

connncrrour, A conronerron or con- 'j rnnnr a stern, or new BRITAIN,

' nncrrcun',

naaaeae. i

. certain new and useful Improvement in Vacuum-Insulated Vessels, of which the following is a full, clear, and exact description.

My invention relates to improvements in double-walled vacuum insulated vessels, and

; has for its object to provide a new and improved spacer and support to be held between the two walls of the vessel.

The object of my invention is to provide block or pad spacers with a holding frame of metal such that the pads will be securely held in the frame and in contact with the outer wall, the inner wall being engaged by metallic portions lying between the inner wall and the pads.

The following is a description of an embodiment of my invention, reference being had to the accompanying drawings, in which:

Figure 1 shows a'vertical sectional view pf a vacuum bottle embodying my invenion; Fig. 2 is a horizontal section of the same;

Fig. 3 is a plan view of one of the spacers removed from the vessel;

gig. 4 is a front side elevation of the same, an

Fig. 5 is a rear side elevation of thesame.

Referring more particularly to the drawings, land 2 are respectively the inner and outer walls of a vacuum insulated vessel, such as a vacuum bottle, said walls being connected together at their upper ends in the ordinary manner. 3 is a metallic strip curved to conform to the inner wall and having at its two ends holes in which are located and held pads 4 of heat insulating material, preferably asbestos. Extending from the centralportionof the strip are two.

tongues 5, terminating in enlarged ends 6, which enlarged ends are in line with the pads 4 and separate those pads from the inner wall of the vessel when the device is in place; The tongues 5, with their enlarged In use the support is located between the I Specification of Letters Iatent. Application filed May 1, 1917. Serial No. 165,674.

. Patented (Bot. 23, 191W,

inner and outer walls 1 and 2 with the pads 4 in engagement with the outer wall. This engagement with the outer wall holds the support in the position in which it is placed, during the process of manufacture of the bottle 7 In the process of manufacture of the bottle the bottom of the outer wall is closed before the inside portion of the bottle is fully pushed down into its place, the spacers havingbeen previously placed in proper position relatively to the outer wall. After the bottom has been sealed, the inside portion is pushed down to the right distance from the outside bottom. By having the metal in contact with the inner wall and the asbestos in contact with the outer wall, the spacing de-- vice is held in position during such pushing, by reason of the frictional engagemnt of the asbestos with the outer wall, the metal allow ing the inner wall to move freely without dis.- placing the supports. The metal used is preferably a soft steel having little, if any, resiliency. The fact that the co-eficient of friction between the asbestos and glass is greater than the co-eflicient of friction be tween the metal and glass, is relied upon to prevent the displacement during the manufacture, as above-described. After the bottle is completed, the friction between the support and both the inner and outer walls acts to hold thespacer in place.

As will be evident to those skilled in the art, my invention permits of various modifications without departing from the spirit 7 thereof or the scope of the appended claims.

What I claim is: 1. Means for spacing and supporting the walls of a double-walled vacuuminsulated vemel of fragile material, consisting of a 2. Means for spacing and supporting the walls of a double-walled vacuum insulated vessel of fragile material, consisting of a strip of metal having openings in each end and integral tongues extending behind each opening and cushions of non-heat-conducting material locatedin said openings, said tongues extending in opposite directions and being provided at their ends with enlargements situated in line with said cushions.

3. Means for spacing and supportin the Walls of a double-Walled vacuum ins ated 5 vessel of fragile material, consisting of a strip of metal having openings in each end and integral tongues extending behind each' opening and cushions of non-heat-conducting material located in said openings, combined with said vacuum vessel so that the metallic strip engages the inner wall.

FREDERICK E. OARLSON. 

